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Agnostidae

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Journal Article
Published: 01 January 1955
Journal of Paleontology (1955) 29 (1): 86–101.
Journal Article
Published: 01 January 2009
Journal of Paleontology (2009) 83 (1): 1–8.
...Harry B. Whittington Abstract Trilobites of this suborder from Europe and North America have not been studied in detail, in contrast to the attention given to relationships within the orders Agnostida and Ptychopariina. The basis of the Corynexochina is the type species of Corynexochus from...
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Journal Article
Published: 01 February 2005
Journal of Paleontology (2005) 79 (2): 312–336.
..., namely Protoleninae by Hamatolenus (H .) aff. H . ( H .) marocanus and H . ( Myopsolenus ) aff. H . ( M .) magnus and Ellipsocephalidae by Holocephalina aff. H. levis , thus strengthening faunal relationships with midshelf Cambrian sequences in Morocco and Spain. Reinterpretations of Agnostida, based...
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Journal Article
Published: 01 November 2001
Journal of Paleontology (2001) 75 (6): 1141–1151.
... material. Trilobites are a well-defined clade within a larger arachnomorph group. Agnostida have been excluded from Trilobita, but are perhaps best considered as specialised trilobites, at least until limbs of eodiscids are described. The outstanding problems in classification of each trilobite order...
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Series: AAPG Memoir, AAPG Memoir
Published: 01 January 1973
DOI: 10.1306/M19375C31
EISBN: 9781629812199
... of Protolenidae and the appearance of Oryctocephalidae, Agnostidae, and Paradoxididae. The Middle Cambrian is divided into the Amginian and Mayian Stages. Amginian rocks range from limestone to black shale, but they contain similar trilobite assemblages and are divisible into three zones. The Amginian-Mayian...
Journal Article
Journal: AAPG Bulletin
Published: 01 December 1970
AAPG Bulletin (1970) 54 (12): 2494.
... Oryctocephalidae and Agnostidae. The Middle Cambrian, according to the accepted stratigraphic code of the USSR, is divided into the Amganian and Maiyanian Stages. The Amganian deposits, in spite of their facies complexity, are characterized by similar trilobite assemblages and may be subdivided into 3 zones...
Journal Article
Published: 01 May 1964
Journal of Paleontology (1964) 38 (3): 510–566.
...), mollusks (four species), and sponges (two species) are described. Three genera (Trymataspis, Utagnostus, Utaspis) and 21 species of trilobites are new. Abundant silicified specimens provide new information on morphology and ontogeny of agnostid trilobites. Evolutionary trends within Agnostidae and other...
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Trilobite classification schemes of Swinnerton ( 1915 ), Harrington  et al....
Published: 20 June 2019
Opisthoparia Suborder Mesonacida Suborder Conocoryphida Section Olenina Section Conocoryphina Section Ptychoparina Section Calymenina Suborder Trinucleida Suborder Odontopleurida Order Proparia Encrinuridae Cheiruridae Phacopidae Burlingiidae ?Agnostidae Order Agnostida
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Cambrian arthropods with ramified digestive glands. (a–d)  Notchia
        ...
Published: 31 July 2014
(a) and UU14022.01b (b). (c, d) Reconstructions of the dorsal exoskeleton (c) and the digestive system (d); the shape of the digestive tract is hypothetical. (e–g) Reconstructions of comparable digestive systems in other Cambrian arthropods. (e) Acidusus (Agnostida), middle
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Updated summary of trilobites reported with preserved appendages, supplemen...
Published: 05 April 2017
Agnostida Agnostidae ++ ++ ++ o Cam. Guzhangia Orsten Phosphatic Müller & Walossek, 1987 Symphysurus sp. Asaphida Nileidae + + o + Ord. Tremadocian Fezouata Burgess Van Roy et al . 2010 Placoparia cambriensis Phacopida Pliomeridae ++ o o + Ord. Darriwilian Lower
Journal Article
Published: 01 June 1994
Canadian Journal of Earth Sciences (1994) 31 (6): 969–985.
... interne. Les faunes sont caractérisées par une faible diversité et, contrairement aux faunes plus diversifiées des plates-formes ouvertes de d'autre régions de l'Amérique du Nord, les trilobites de la famille des Agnostidae sont absents. Un nouveau cadre biostratigraphique est défini pour deux zones et...
Journal Article
Published: 13 April 2010
Geological Magazine (2010) 147 (5): 789–796.
...). Ergaliev G. K. & Ergaliev F. G. 2008 . Middle and Upper Cambrian Agnostida of the Aksai National Geological Reserve South Kazakhstan (Kyrshabakty River, Malyi Karatau Range) . Almaty : Gylum , 376 pp. (in Russian with English abstract, introduction and figure captions). Ergaliev G...
Journal Article
Published: 20 June 2019
Geological Magazine (2020) 157 (1): 35–46.
... Opisthoparia Suborder Mesonacida Suborder Conocoryphida Section Olenina Section Conocoryphina Section Ptychoparina Section Calymenina Suborder Trinucleida Suborder Odontopleurida Order Proparia Encrinuridae Cheiruridae Phacopidae Burlingiidae ?Agnostidae Order Agnostida...
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Journal Article
Published: 01 July 2006
Geological Magazine (2006) 143 (4): 447–455.
... as a potential stage base marker, only this species and the closely related L. armata are briefly commented upon below. Order AGNOSTIDA Salter, 1864 Family ptychagnostidae Kobayashi, 1939 Genus Lejopyge Hawle & Corda, 1847 Type species. Battus laevigatus Dalman, 1828 , pp. 136–7...
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Journal Article
Published: 28 August 2019
Geological Magazine (2020) 157 (3): 405–410.
... ) Biodiversity, biofacies and biogeography of middle Cambrian (Series 3) arthropods (Trilobita and Agnostida) on the East Gondwana margin . Gondwana Research 26 , 654 – 74 . Huang DY ( 2012 ) Eocrinoids from the Cambrian Mantou Formation of Dalian, Liaoning . Chinese Science Bulletin 57...
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Journal Article
Published: 11 September 2015
Journal of Paleontology (2015) 89 (3): 377–384.
... . Laurie J.R ., 1988 , Revision of some Australian Ptychagnostinae (Agnostida, Cambrian) : Alcheringa , v. 12 , p. 169 – 205 . Laurie J.R ., 2008 , Species relationships in the Ptychagnostidae...
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Journal Article
Published: 08 May 2013
Canadian Journal of Earth Sciences (2013) 50 (5): 503–518.
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Journal Article
Published: 01 November 2007
Geological Magazine (2007) 144 (6): 953–961.
...; Clarkson , E. N. K. 2005 . Morphology, ontogeny, and enrollment of the Lower Cambrian eodiscoid trilobite Calodiscus lobatus from Sweden . GFF 127 , 46 . Cotton , T. J. & Fortey , R. A. 2005 . Comparative morphology and relationships of the Agnostida . Crustacean Issues 16...
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Journal Article
Published: 18 June 2018
Journal of Paleontology (2018) 92 (6): 1018–1027.
...., Treatise on Invertebrate Paleontology, Part O, Arthropoda 1, Trilobita, Revised , v. Volume 1 , Introduction, Order Agnostida, Order Redlichiida, Boulder, Colorado and Lawrence, Kansas , Geological Society of America and University of Kansas , p. 173 – 247 . Chatterton , B.D.E. , Siveter...
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Journal Article
Published: 01 March 2012
Journal of Paleontology (2012) 86 (2): 201–237.
... they are to agnostoids and, accordingly, we use Agnostida in the sense of Robison, 1984 , who excluded eodiscoids. Family A gnostidae M'Coy, 1849 Attempts to apply quantitative phylogenetic methods to agnostoid classification (e.g., Westrop et al., 1996 ) have met with mixed success, and most...
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